"Eric Braeden is a D-Bag. the actor, (Robin's dad) agreed to a cameo, then last night bailed, saying the part wasn't 'substantial' enough," Harris tweeted Friday.Check out photos from HIMYM

Harris wrote in a second tweet that Twin Peaks and Reaper alum Ray Wise will replace Braeden.

"[Wise is] a fantastic actor who makes any part 'substantial,' Harris tweeted. "Super excited to welcome him to the family!"

Braeden — who last year temporarily left Young & the Restless over a contract dispute — first guest-starred on Mother two years ago as Robin Charles Scherbatsky Sr., Robin's dad who was so desperate to have a son that he named her Jr. and raised her as if she were a boy.